The air in Delhi has turned grey, heavy and hazardous once again. With the Air Quality Index (AQI) soaring past 400 and even entering the “hazardous” category in many zones, ordinary walks or commutes ...

Face masks, like any article of clothing, get dirty with wear. They can also carry the coronavirus if an infected person comes in contact with you. So how often should you wash them? The Centers for ...

Add Yahoo as a preferred source to see more of our stories on Google. An-N95-respirator-mask-sits-on-a-black-tabletop. Filtering face-piece respirators like N95 masks are often a standard piece of ...

The U.S. Centers of Disease Control and Prevention says health care workers can wear an N95 mask up to five times. But experts say how often the average person can safely wear one will vary depending ...

SAN FRANCISCO (KGO) -- Doctors say any mask is better than no mask, but cloth masks may not be getting the job done well enough against omicron. As cases surge, many are turning to N95 or KN95 masks ...